Air valve



. May 25,1942 G. R. ME'fzDoRF 2,234,007

VAIR VALVE Filed Aug. 2, 1940 yah- 'i being connected with the sont a.

Patented May 26,1942

George It. Metzdorf, Chicago, Ill., assignor to The Dole Valve Company, Chicago, Ill., a corporation of Illinois pplication August 2, 1940, Serial No. 349,604

. v Claims. `This invention relates to air valves andhas for its object to provide a new and improved device of this description.

The invention has as a further object to prokvide anl air valve having a casing with a nipple valve with a nipple and a syphon tube provided with a baille connected with the nipple and syphon tube, which permits water to drain out at the bottom and the steam to pass in at the top. The invention has as a further object to provide an air valve having a casing with a bottom having an inturned edge and separate from vthe casing, and a nipple which has an enlargement engaging the casing and the inturned edge of said bottom'.

The invention has other objects which are more particularly pointed out in the accompanying description.

Referring now the drawing, l

Fig. 1 is a sectional view through one form of device embodying the invention;

Fig. 2 is a sectional view taken on line 2-2 of Fig. 1;

Fig. 3 is an enlarged sectional view taken on line 3 3 of Fig. 1;

Fig. 4 is an enlarged sectional view taken on casing I with an air vent 2 and a valve member 3 which controls said air vent, said valve member The casing I is provided with a bottom 5 whichV is separate therefrom, but which is attached thereto. The iioat 4 rests upon the upwardly bent portion B of the bottom 5. There is a nipple 1 which projects through an opening in the casing near the bottom thereof, and by means of which the air valve is fastened to the radiator. Adrain pipe 8 extends through this nipple. The nipple is provided with an enlarged end which may be integral therewith or attached thereto and which preferably has an upper thin end 8 and a lower thicker end I0. This enlarged end is on the inside of the casing'. The bottom 5 is open at one side and has inwardly bent inclined portions II.

The portionl of the enlarged end of the nipple ts into the space between the parts II of the bottom and engages said parts and is preferably connectedthereto by solder or otherwise. This enlarged end of the nipple is also preferably solsoldered to thecasing as shown at 1a, to prevent leakage.

There is a washer I2 surrounding the drain pipe 8 and located between the shoulders I3 and 5 I4 thereon. This washer isv preferably shaped so' that it does not entirely flll the opening in the nipple, but leaves a space I5, at the top, through which steam vmay enter the valve casing, In order to provide this opening, the washer preferably has a flat top IS and is also preferably cut away at the edges Il Aand I8, as shown. The washer is held in position bythe holding pieces I9 which are preferably integral with the nipple 1 and are providedby punching or deforming the nipple so as to project past the washer so as to hold it in position, see Fig. 3. f

The bottom is preferably provided with a plurality of inwardly extending projections 2|) which center the float 4,

The air valve when in use, is yattached to the radiator by the nipple l, with the drain pipe 8 inside of the radiator. The steam and water enter the casing I through the nipple and the opening I5, which drives the air out of the air vent opening 2. The portion ofthe steam which Ais condensed, settles to the bottom of the casing and the lower portion of the washer I2 prevents it from flowing out through the drain pipe until a predetermined level of water is secured in the casing,\ whereupon the water will then drain out through the drain pipe 8 into the radiator. The steam as it passes through the nipple, hits the washer I2 and said washer assists in directing the steam upwardly, as it enters the casing I. 'Ihe thin upper part 9 of the enlargement of the nipple makes it easier for the steam to go upwardly as it affords very little obstruction to this upward movement of the steam. The part I0 of the enlargement on the nipple lls the opening in the bottom 5 so that water is maintained in this bottom to partially submerge the float 4.

'I'he narrow upper part 9 of the'enlarged end of the 'nipple provides more space between the oat and the casing and aids in the drainage of the` above a predetermined height, the float 4 is liftedv so as to close the opening 2 to prevent water from escaping.-

I claim: l 1. An air valve comprising a casing made of a single piece having an opening in the side thereofl a nipple extending through said opening in the casing for attaching it to a radiator, said nipple provided with an enlargement on the indered to the casing and the nipple is preferably side of the casing, and a bottom separate from outerendthereof, a washer having an opening therethrough and ntting over the inner endoifv said drain pipe, said washer closing the opening across the opening thorugh the nipple above the` Y drain pipe. so as'to leave an opening above the' washerandinproximitytothethinportionoi the enlargement;` onth e nipple, for communication between the exterior and the interior of the valve casing. 1

4. An air valve comprising a casing lhaving an opening near the bottom, a nipple connected with the casing at the opening and projecting outwardly therefrom.v a drain pipelnexiending into said nipple and projecting outwardly therefrom, and a washer' surrounding the inner end of said drain pipe and larger in diameter than the opening through said nipple, said washer engaging the nipple so as to close the lower part y ot the opening between the nipple and the drain pipe, the upper part oi the washer being sepathrough the nipple below the drain pipe and extending part wayacross the opening through the nipple above the drain pipe, so as to leave an opening above the washer for communicationl between the exterior and the interior of the` valve casing. r

3. An air valve comprising a casing, a nipple extending through said casing for attaching. it to a-radiator, said nipple provided with an enlargement on the inside oi the casing, having an upperthin portion and a lower thicker portion,v a cup-shaped bottom separate from the casing and having an opening 4at one side, the thicker portion ot the enlargement on the nipple 'fittingA into this opening and being attached to rated from the wall ofthe nipple by a space through which steam may enter the valve casing, the washer being so constructed and arranged as to direct the steam'in an upwardly direction through this opening.` j f valve comprising a casing having an opening near the bottom. a nipple connected with the casingand projecting outwardly'there- I from; sdram pipe extending into said `nipple and projecting outwardly therefrom, and a lwasher surrounding .theinner end oi said drain i pip'e and larger'in diameter than the opening n `throughsaid nipple, said washer closing that portion ofzthe opening in the nipple `from the top ot the drain pineto the bottom of the nipple opening; but leaving a space above said drain pipe vthrough which steam may enter the valve casing, said washer vbeing so constructedlland arranged as todirect the steam in an upwardly said opening into'said casing.

direction through GEORGE R. METZDORF. 

